US7530849B2 - Lamp holding device - Google Patents

Lamp holding device Download PDF

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Publication number
US7530849B2
US7530849B2 US11/662,455 US66245505A US7530849B2 US 7530849 B2 US7530849 B2 US 7530849B2 US 66245505 A US66245505 A US 66245505A US 7530849 B2 US7530849 B2 US 7530849B2
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United States
Prior art keywords
lamp
conductive element
resilient counter
conductive
hollow body
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Expired - Fee Related, expires
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US11/662,455
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English (en)
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US20080132117A1 (en
Inventor
Livio Colosio
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E M C Colosio SpA
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E M C Colosio SpA
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Assigned to E.M.C. COLOSIO S.P.A. reassignment E.M.C. COLOSIO S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COLOSIO, LIVIO
Publication of US20080132117A1 publication Critical patent/US20080132117A1/en
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Publication of US7530849B2 publication Critical patent/US7530849B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/09—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for baseless lamp bulb

Definitions

  • the present invention relates to a lamp holding device.
  • the invention relates to a holding device commonly known as “lamp holder” or “lamp socket”, adapted to associate a lamp with the respective energised electric contacts and to ensure interchangeability.
  • Lamp holders generally made of an electrically insulating material, further allow assembling of same to bodies of lighting apparatus of different kinds constituting spotlights or floodlights, for example.
  • the present invention advantageously applies, as a lamp holding device, to the lamps of new conception identified by the abbreviation PGJ5, which lamps have a rated voltage of 250 V and an impulse voltage of 1500 V.
  • Such lamps like the lamp Philips® CDM 20 W 250V with ballast ignition providing impulse discharges up to 1500 V, consist of a bulb made of glass and having a substantially oval shape, from which the light is emitted.
  • connection elements extend opposite each other and transversely to the longitudinal extension of the lamp.
  • each connection element has a substantially parallelepiped conformation with a square cross-section, in which four faces are defined at least one of which is arranged to be associated with a respective electric contact of the lamp holding device.
  • lamp holding devices of the above mentioned type consist of a ceramic body of a substantially cylindrical conformation in which a bore for passage of the lamp is formed.
  • the bore has a substantially elongated shape in which two opposite ends are defined to enable passage of the electric contacts.
  • the lamp when the lamp is inserted into the bore, the lamp is rotated around its longitudinal axis in such a manner that its end portions are disposed in correspondence with two electric contacts (bayonet coupling).
  • the electric contacts consist of laminar portions made of a conductive material (metal) and are inserted into suitable spaces formed in the ceramic body on opposite sides of the passage bore for the lamp.
  • Each electric contact is connected to a power cord by means of a suitable welding, and has a conveniently shaped flat surface to get in contact with a respective face of a connection element.
  • connection element abuts against the spring which is maintained in a compressed state.
  • the electric contact is maintained steadily associated with the connection element to ensure a continuous electric connection.
  • Known lamp holding devices further have suitable seats such arranged as to enable housing of fastening screws to associate the device itself with any frame, such as a structure of lighting apparatuses like spotlights or floodlights, for example.
  • the screws are fitted in respective through holes formed in the ceramic body and disposed on opposite sides of the lamp. To facilitate mounting operations of the device, the screws are inserted from the bulb portion of the lamp so as to arrange the respective head towards the outside of the ceramic body.
  • the above described lamp holding devices are not very reliable as regards the electric connection between the device contacts and the lamp connection elements.
  • the lamp may slightly rotate causing separation of the connection elements from the electric contacts.
  • any connection element can get into engagement with the electric contacts irrespective of its shape. It is in fact to be noted that an electric connection is defined through coupling of a face of each connection element with a respective flat surface of the electric contact. Therefore insertion of a lamp with a different type of connection is possible, such as a lamp with a connection of the “G9” type. Insertion of a non suitable lamp into the holding device gives rise to important drawbacks, such as burst of the lamp if it is overpowered because the operating features of the lamp are different from the expected ones.
  • a further drawback relates to positioning of the seats for the hooking screws distributed in the ceramic body.
  • the ceramic body generally made of steatite, is very fragile. This fragility is due not only to the material of which the body is made, such as said ceramic material, but also to the fact that the body itself has a very wide cavity and very thin walls in order to enable a bayonet coupling of the lamp.
  • the technical task underlying the present invention is to devise a lamp holding device capable of substantially obviating the mentioned drawback.
  • a lamp holding device in particular for lamps identified by the abbreviation PGJ5 having a rated voltage of 250V and an impulse voltage of 1500V, capable of ensuring a steady electric contact between the lamp and the electric contacts even in the event of slight movements of the whole device.
  • Another important aim of the invention is to devise a lamp holding device capable of enabling coupling exclusively with a single preestablished lamp type, i.e. with a lamp having a PGJ5 connection or base.
  • FIG. 1 shows a perspective view of the holding device in accordance with the invention coupled with a respective lamp and with a frame B;
  • FIG. 2 is a perspective view of the device in FIG. 1 uncoupled from said lamp;
  • FIG. 3 shows a further perspective view of the device in FIG. 2 in a second possibility of use
  • FIGS. 4 and 5 both show a construction detail of the device in FIG. 1 in front and rear perspective views, respectively;
  • FIG. 6 is a perspective view to an enlarged scale of an electric contact being part of the device in FIG. 1 ;
  • FIG. 7 shows the detail in FIG. 5 coupled with two electric contacts shown in FIG. 6 ;
  • FIGS. 8 and 9 both show a further construction detail of the device in FIG. 1 in front and rear perspective views, respectively;
  • FIG. 10 is a perspective view of a further construction detail of the holding device in accordance with the invention.
  • FIG. 11 shows a perspective view of the device seen in FIG. 2 coupled with the detail in FIG. 10 ;
  • FIG. 12 shows the construction detail seen in FIG. 10 in a first embodiment
  • FIG. 13 shows the construction detail seen in FIG. 10 in a second embodiment.
  • the lamp holding device in accordance with the invention has been generally denoted at 1 .
  • a known lamp of this type presently on the market is the lamp Philips CDM 20 W, 250V with ballast ignition providing impulse discharges up to 1500 V, which is diagrammatically shown in FIGS. 1 and 14 .
  • lamp is a lamp exclusively having the above mentioned features.
  • This lamp 2 consists of a light emitting bulb 2 a made of glass or other transparent material.
  • the bulb 2 a has a substantially elongated conformation and extends along a respective longitudinal axis.
  • the lamp further has an end portion 3 of a substantially cylindrical conformation and extending from the opposite side of the bulb 2 a along said longitudinal axis.
  • the end portion 3 has two conductive elements extending from respective opposite sides, along one identical direction transverse to the longitudinal extension of the end portion 3 .
  • each conductive element has a parallelepiped conformation with a square cross section in which four side walls are defined.
  • the holding device 1 comprises a hollow body 4 which is electrically insulated and is set to receive the end portion 3 of lamp 2 .
  • the hollow body 4 better shown in FIGS. 4 , 5 and 7 , is made of ceramic material, advantageously steatite, and has a substantially cylindrical conformation in which an outer surface 4 a facing the bulb 2 a of lamp 2 and an inner surface 4 b facing the end portion 3 are defined.
  • the hollow body 4 further has a through slot 5 made in the middle of the hollow body 4 and set to receive the end portion 3 of lamp 2 .
  • the slot 5 consists of a central hole 5 a and two side portions 5 b disposed on opposite sides of the central hole 5 a and adapted to enable passage of the conductive elements of the end portion 3 .
  • Two diametrically opposite apertures 6 are formed at the inner surface 4 b of the body 4 , each of said apertures being disposed in side by side relationship with a side portion 5 b of the slot 5 (see in particular FIG. 5 ).
  • each aperture 6 is suitably arranged and shaped for receiving an electric contact 7 .
  • each electric contact 7 is advantageously made of metal and can be associated with a respective conductive element projecting from the end portion 3 of the lamp 2 to connect the lamp 2 to suitable electric-energy transmitting means A shown in the accompanying drawings.
  • shown in FIG. 2 is a pair of cables A projecting from underneath the device.
  • cables A can be disposed on opposite sides of the device, as shown in FIG. 3 .
  • each electric contact 7 comprises a first and a second resilient counter-element 9 , 10 both movable between an opened position to enable passage of the respective conductive element and a constraint position to lock said conductive element.
  • each resilient counter-element 9 , 10 has a contact surface 9 a , 10 a susceptible of abutment against a respective side wall of the conductive element of the lamp 2 .
  • each electric contact 7 has a substantially laminar conformation and an arched extension so that it extends along the side wall of body 4 .
  • each resilient counter-element 9 , 10 consist of two portions projecting towards the centre of the hollow body 4 , which are of laminar conformation as well.
  • each resilient counter-element 9 , 10 consists of a thin plate such bent as to define a slide surface 9 b , 10 b contiguous to the respective contact surface 9 a , 10 a.
  • the slide surfaces 9 b , 10 b are set to abut against the conductive element during movement of the respective resilient elements 9 , 10 from the constraint position to the opened position, to enable passage of the conductive element, as better clarified in the following.
  • the first resilient counter-element 9 extends transversely of the second resilient counter-element 10 , so that the respective surfaces 9 a , 10 a are disposed along respective planes perpendicular to each other.
  • each electric contact 7 further has an abutment element 11 facing the first resilient element 9 and having a respective surface 11 a .
  • the abutment element 11 too has a laminar conformation and the respective surface 11 a is parallel to the contact surface 9 a of the first resilient element 9 and set to abut against a side wall of the conductive element of lamp 2 .
  • first resilient counter-element 9 the second resilient counter-element 10 and abutment element 11 define a holding space 13 for the respective conductive element (see in particular FIG. 7 ).
  • the conductive element when the end portion 3 is inserted into the body 4 , the conductive element appears to be adjacent to the slide surface 9 b of the first resilient element 9 and out of the mentioned holding space 13 .
  • the conductive element is brought towards the first and second resilient elements 9 , 10 and abuts against the slide surfaces 9 a , 10 a thereof. Due to the thrust action of the conductive element on the first and second resilient elements 9 , 10 , said elements 9 , 10 take their respective opened position to enable passage towards the holding space 13 .
  • the resilient element 10 pushes the conductive element in parallel to the central axis of lamp 2 and in the opposite direction to said lamp 2 , so that said lamp is maintained in contact with the upper surface 4 a of the lamp holder.
  • the conductive element is located in the holding space 13 and three out of the four faces abut against the respective contact surfaces 9 a , 10 a and 11 a.
  • the device 1 further comprises a supporting element 14 made of an electrically insulating material, preferably plastic material, and having a respective housing space 15 within which the above mentioned hollow body 4 is housed.
  • the supporting element 14 has a substantially cylindrical conformation in which an inner surface 14 a is defined that is disposed in the housing space 15 and abuts against the inner surface 4 b of the hollow body 4 . Extending opposite to the inner surface 14 a is an outer surface 14 b set to abut against hooking means 16 described in more detail in the following.
  • the supporting element 14 has a passageway 15 a connecting space 15 with the outer surface 14 b .
  • This passageway 15 a is placed at a central position and is adapted to enable passage of the electric cables A secured to contacts 7 for current distribution.
  • the hollow body 4 appears to be fitted into the housing space 15 of the supporting element 14 in such a manner that only the outer surface 4 a of the hollow body 4 is out of the supporting element.
  • the whole hollow body 4 that, as above said, is made of a ceramic material and therefore has features of great fragility, appears to be protected by the supporting element 14 .
  • hollow body 4 can be in engagement in a reversible manner with the supporting element 14 by means of suitable connecting elements of known type and therefore not further described or illustrated in detail.
  • the device 1 further has hooking means 16 to secure the supporting element 14 to a frame, a ceiling light or any other support.
  • the hooking means 16 consists of a junction element 17 b having a flat conformation.
  • the junction element is made up of a holed disc having a substantially circular peripheral extension and in coaxial engagement with the outer surface 14 b of the supporting element 14 .
  • the hooking means 16 is further provided with a pair of screws 17 housed within respective cavities 18 made in the junction element 17 b . Under this situation, the screws 17 have respective heads 17 a facing the outer surface 14 b of the supporting element 14 .
  • the junction element 17 b has at least one projecting portion 8 facing the supporting element and adapted to be inserted into a suitable opening 19 formed in the outer surface 14 b (see in particular FIG. 8 ).
  • the junction element 17 b has two projecting portions 8 , each of which has a flat spring 8 a on top for engagement into a recess 8 b formed in the supporting element 14 at said opening 19 .
  • the junction element 17 b can be associated with the supporting element 14 through insertion of the projecting portions into the respective openings 19 .
  • screws 17 enable mounting of the junction element 17 b to a respective frame or support denoted at B in FIGS. 12 and 13 which is shown in two different embodiments both known and therefore not described in detail.
  • junction element 17 b associated with a support B having an L-shaped conformation and being part of a support structure of a protection glass, merely given by way of example.
  • junction element 17 b connected to a lamp support B arranged for insertion into a suitable housing space for lamps.
  • the hooking means 16 can be associated with the device 1 also in the condition showing the hollow element 4 inserted into the housing space 15 of the supporting element 14 .
  • lamp 2 is associated with the hollow element 4 .
  • the end portion 3 of lamp 2 is inserted into slot 5 as above described.
  • the lamp 2 is rotated around its longitudinal axis.
  • each conductive element causes abutment of two side walls perpendicular to each other onto the slide surfaces 9 b , 10 b of the resilient counter-elements 9 , 10 .
  • the resilient elements 9 , 10 take their respective opened positions letting the conductive element enter the holding space 13 .
  • the conductive element When the conductive element enters the holding space 13 , it causes abutment of the first side wall against the surface 11 a of the abutment element 11 . Under this situation, due to the resilient features of the counter-elements 9 , 10 , the latter go back to their starting condition corresponding to the constraint position at which the contact surfaces 9 a , 10 a are in abutment on respective side walls of the conductive element.
  • three out of the four side walls of each conductive element are in abutment against a respective surface and the conductive element is locked by means of the thrust action of the resilient elements 9 , 10 .
  • the hollow body 4 is inserted into the above described supporting element 14 .
  • the junction element 17 b is coupled with the respective support B by means of said screws 17 and subsequently the supporting element 14 associated with the hollow body 4 is fitted on the projecting portions of the junction element to enable the flat spring 8 a to engage the recess 8 b.
  • the invention achieves important advantages.
  • the device enables the conductive elements of the lamp 2 to be steadily secured to the electric contacts 7 .
  • each contact element is associated with the respective electric contact 7 at three different points.
  • the lamp is in any case maintained in abutment on at least one surface 9 a , 10 a , 11 a .
  • the conductive element of the lamp keeps locked within the holding space 13 . Consequently, distribution of electric energy to the lamp 2 is always ensured.
  • a further advantage resides in that the electric contacts are only compatible with conductive elements of a predetermined size.
  • the holding space 13 set to receive a conductive element of given sizes is not able to receive conductive elements of different sizes or shapes that can be energised.
  • the shape of said contacts enables a soft insertion of the lamp and also enables detection of when a correct insertion and coupling has occurred due to snap fitting of the resilient portions; in addition it also allows energising only after the lamp has started rotation and not with the lamp insertion alone.
  • the device 1 can only be used for the intended type of lamp and other lamp types cannot be inserted into said holding space 13 and therefore cannot be dangerously energised.
  • Another advantage is represented by the positioning of screws 17 so that they do not run the risk of damaging the hollow body 4 when applied by the user to mount the lamp holder.
  • said screws 17 are disposed on the junction element 17 b and not directly on the hollow body 4 so that there is no risk of damages to the hollow body made of ceramic material.
  • the mounting distance of the screws themselves can be advantageously freely varied depending on requirements, by selecting a distance between centres of 12 mm or also of 11.4 mm as in most of usual applications for lamp holders of very low voltage.
  • the supporting element 14 made of insulating material which is in contact with the screw heads 17 a enables better insulation of the energised parts. As a result, the screws do not run the risk of being energised even in the event of possible breaking of the device.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Vehicle Body Suspensions (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
US11/662,455 2004-09-10 2005-09-07 Lamp holding device Expired - Fee Related US7530849B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT000099A ITBS20040099A1 (it) 2004-09-10 2004-09-10 Dispositivo di supporto per lampade
ITBS2004A000099 2004-09-10
PCT/IT2005/000512 WO2006027816A1 (en) 2004-09-10 2005-09-07 Lamp holding device

Publications (2)

Publication Number Publication Date
US20080132117A1 US20080132117A1 (en) 2008-06-05
US7530849B2 true US7530849B2 (en) 2009-05-12

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US11/662,455 Expired - Fee Related US7530849B2 (en) 2004-09-10 2005-09-07 Lamp holding device

Country Status (8)

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US (1) US7530849B2 (de)
EP (1) EP1792372B1 (de)
CN (1) CN101015098B (de)
AT (1) ATE428197T1 (de)
DE (1) DE602005013801D1 (de)
ES (1) ES2323511T3 (de)
IT (1) ITBS20040099A1 (de)
WO (1) WO2006027816A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7731545B1 (en) * 2009-02-25 2010-06-08 Osram Sylvania Inc. Lamp socket and contact for said socket
US20110028015A1 (en) * 2009-07-30 2011-02-03 Tyco Electronics Corporation Quick insertion lamp assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021112799B4 (de) * 2021-05-18 2023-01-12 Bjb Gmbh & Co. Kg Lampenfassung mit Halteklammer für Lampe
DE102021112800B4 (de) * 2021-05-18 2023-03-02 Bjb Gmbh & Co. Kg Backofenleuchte mit axial wirkender Verriegelung
US11815256B1 (en) * 2022-09-23 2023-11-14 Air Cool Industrial Co., Ltd. Ceiling fan light structure

Citations (6)

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Publication number Priority date Publication date Assignee Title
DE2848004A1 (de) 1978-11-06 1980-05-08 Bender & Wirth Steckfassung von elektrischen glassockellampen
US5000702A (en) * 1989-05-17 1991-03-19 Zanxx, Inc. Low profile lamp socket assembly and method of making
US6039579A (en) * 1996-02-22 2000-03-21 Tricon Industries, Incorporated Sealed socket assembly for a plug-in lamp and a method for assembling same
DE20100762U1 (de) 2000-01-21 2001-03-22 E.M.C. Colosio S.r.l., Provaglio D'Iseo, Brescia Lampenfassung für Niederspannungsglühbirnen
US20030068929A1 (en) * 2001-10-04 2003-04-10 Guide Corporation Wedge base sealed lamp socket
US6971917B2 (en) * 2003-02-12 2005-12-06 Vossloh-Schwabe Deutschland Gmbh Socket for an electrically operated device

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Publication number Priority date Publication date Assignee Title
CN1178607A (zh) * 1995-11-16 1998-04-08 菲利浦电子有限公司 推进/推出式灯座
DE10163055B4 (de) * 2001-12-21 2004-07-08 Bjb Gmbh & Co.Kg Lampenfassung, insbesondere Fassung für Halogen-Hochvoltlampen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2848004A1 (de) 1978-11-06 1980-05-08 Bender & Wirth Steckfassung von elektrischen glassockellampen
US5000702A (en) * 1989-05-17 1991-03-19 Zanxx, Inc. Low profile lamp socket assembly and method of making
US6039579A (en) * 1996-02-22 2000-03-21 Tricon Industries, Incorporated Sealed socket assembly for a plug-in lamp and a method for assembling same
DE20100762U1 (de) 2000-01-21 2001-03-22 E.M.C. Colosio S.r.l., Provaglio D'Iseo, Brescia Lampenfassung für Niederspannungsglühbirnen
US20030068929A1 (en) * 2001-10-04 2003-04-10 Guide Corporation Wedge base sealed lamp socket
US6971917B2 (en) * 2003-02-12 2005-12-06 Vossloh-Schwabe Deutschland Gmbh Socket for an electrically operated device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"Neuheiten 2004," Dec. 31, 2004, Bender & Wirth, http://www.bender-wirth.com/pdf/catsup.pdf, XP002360311, pp. 1-5.
Philips Lighting: "Light, Innovation and more," Apr. 30, 2004, http://www.lighting.philips.com/DE-DE/tools-downloads/downloads/light-innovation-more/I-and-building.pdf, XP002360309, pp. 35-37, 54.
Philips Lighting: "Mini Master Color CDM-TM Lamps," Dec. 31, 2004, http://wwww.nam.lighting.philips.com/us/ecatalog/hid/pdf/P-5722.pdf, XP002360310, entire document.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7731545B1 (en) * 2009-02-25 2010-06-08 Osram Sylvania Inc. Lamp socket and contact for said socket
US20110028015A1 (en) * 2009-07-30 2011-02-03 Tyco Electronics Corporation Quick insertion lamp assembly
US7892031B1 (en) * 2009-07-30 2011-02-22 Tyco Electronics Corporation Quick insertion lamp assembly

Also Published As

Publication number Publication date
WO2006027816A1 (en) 2006-03-16
CN101015098A (zh) 2007-08-08
ATE428197T1 (de) 2009-04-15
EP1792372A1 (de) 2007-06-06
ES2323511T3 (es) 2009-07-17
US20080132117A1 (en) 2008-06-05
CN101015098B (zh) 2011-08-24
EP1792372B1 (de) 2009-04-08
ITBS20040099A1 (it) 2004-12-10
DE602005013801D1 (de) 2009-05-20

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